Agitator for core-making machines.



PATENTED AUG. 22,, 1905 Nom 797,721.

M. J. COVBLL. AGITATOR FOR CURE MKING MAHINES.

APPLICATION PILE!) APR.12, 1905.

UNITED STATES PATENT FFlCEo MERRIT" J. COVELL, OF LOS ANGELES,CALIFORNA.

Specification of Letters Patent.

Patented Aug. 22, 1905.

Application filed April 12, 1905. Serial No. 255,253.

T0 cLZZ w7wm izf may concern:

Be it known that I, MERRITT J. COVELL, a citizen of the United States,residing at Los Angelcs, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Agitators forCore- Making Machines, of which the following is a specification.-

The object of my invention is to provide simple and reliable means tofeed the material out of which cores are made to the feedscrew and toprevent this material from sticking to the inside of the hopper whilethe core-making machine is in operation. I accomplish these objects bymeans of the device described herein and shown in the accompanyingdrawings, in which Figure 1 is an elevation of a corc-making machinewith my agitator in place therein, the hopper and other parts of themachine heing shown in central vertical section. Fig. 2 is an elevationof my improved agitator removed from the machine. Fig. 3 is a plan ofthe spreader.

In the drawings, A represents the hopper, of any conventional type ofcore-making machine, operated in any conventional way, wherby theoperatingshaf't B is caused to rotate. In the conventional core-makingmachine this shaft carries upon its lower end an auger to press thecore-making material downwardly into the feed-screw 0, which forms thecore; but it has been found that this means of ieeding the prepared sandto the screw is not satisfactory, owing to the fact that the compositionof which sand forms a larger partis more or less mucilaginous and theauger fails to feed it to the coremaking screw C. T0 remedy this, I haveprovided an agitator for placement in a coremaking machine of the typeillustrated in the drawings.

The vertical operatingshaft B, to which the agitator is keyed, as at D,carries the usnal mitergear E, keyed to the upper part of the shaft andby means of which rotation is imparted to the shaft. My agitator properconsists of two downwardly-pr0jecting agitator-arms F, adjustablysecured to the cross-head G by means of the set-screws H. Thiscross-head is adinstably secured on the vertical shaft by the set-screwJ. The downwardly-projecting agitator-arms are arrangcd to fit theintcrior of the cone-shaped hopper A. To adjustably spread thesedownwardlyproj ecting agitatorarms, I have mounted on the lower end ofthe operating shaft the spreader K, adjustably secured on theoperating-shait by the set-screw L. By means of the set-screws J in thecross-head and L in the spreader I am enabled to cause the spring-arms Ft0 closely fit against the inner side of the hopper, and upon therotation of the operatingshaft, which will carry with it the agitator,the contents 0']? the hopper Will be prevented from sticking to theinside of the hopper,- and the result has been that the co1e-sand isrcadily and rcliably led to the :leeding-screw.

Having describcd 1ny invention, what I claim as new, and dcsire tosecure by Letters Patent, is

1. An agitator for coremaking machines, comprising a rotatable shaft, acrosshead and spreader adjustably sccured thcrcon, and arms adjustablysccured to the crosshead, and laterally supported by the spreader.

2. An agitator for coremaking machines, comprising a shaft, across-head, arms sccured thereon, and a spreader adjustably secnred tothe shaft and having loose sliding connection with the arme whereby itsad justments up and clown on the shaft Will cause lateral adjustment ofthe arms.

3. An agitator for core-making machines, comprising a shait, across-head thereon, springarms secured at their upper ends to the outerends of the cross-head, and a spreader secured to the shaft between thearms, said sprcader regulating the position of the free ends of the armswith respect to each other.

4. An agitator for corc making machines comprising a shatt, a cross-head thereon, spring-arms adjustably secured to the crosshead and aspreader adjustably secured to the shaft and bearing against the springarms, whereby to force their free ends apart or admit of their springingtoward each other.

5. The combination with a hopper and a rotatable shaft, of adjustablearms secured to the shaft, and a spreader adjustably secured to theshaft and forked at its enter end to receive the arms whereby to supportthem laterally and to regnlate their position with respect to the wallof the hopper.

6. The herein-described agitator for coremaking machines comprising thevertical operating-shaft B provided with means for its rotation asshown; dow.nwardlyprojecting agitator-arms F adjustahly mounted in thecross-head G and having on the lower end In witness that I daim theforegoing I thereof a spreader adjustab1y mounted on have hereuntosubscribed my name this 6th the opemtng-shaft and adapted to give theday of April, 1905.

downw&rdIyprojeccing agitatorarms the MERRITT J. COVELL. necessaryinclination t0 fit the inside of the WVitnesses: hopper A, substanciallyas herein shown and MYRTLE A. JONES,

described. G. E. IIARPHAM.

